ARM: uniphier: fix various sparse warnings

Fix warnings reported by sparse:
 - ... was not declared. Should it be static?"
 - cast to restricted __be32

While fixing those, the type conflict of cci500_init() was found.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/dram_init.c b/arch/arm/mach-uniphier/dram_init.c
index f79b7cf..6eb8d26 100644
--- a/arch/arm/mach-uniphier/dram_init.c
+++ b/arch/arm/mach-uniphier/dram_init.c
@@ -7,6 +7,7 @@
  */
 
 #include <common.h>
+#include <fdt_support.h>
 #include <fdtdec.h>
 #include <linux/errno.h>
 #include <linux/sizes.h>